The former president was greeting his predecessors and successors before the service began when he can be seen passing something to the former first lady, and she smiles and laughs in response.
This is the second time Mr. Bush has slipped Mrs. Obama a treat. He was seen passing one to her at the funeral service for John McCain earlier this year.
PHOTOS: George HW Bush state funeral
A joint service honor guard carries the casket of former US President George H.W. Bush to an awaiting hearse after his state funeral at the Washington National Cathedral.none
Former President George W. Bush and his wife Laura Bush, center, join their family as they follow the casket of former President George H.W. Bush.none
Former President George Bush and wife Laura Bush former Florida Gov. Jeb Bush, and his wife Columba Bush, center, and other members of the Bush family follow the casket.none
Former President George W. Bush places his hand over his heart as the flag-draped casket of former President George H.W. Bush is carried.none
Former President Jimmy Carter, and Rosalynn Carter hold hands as they walk from a State Funeral for former President George H.W. Bush at the National Cathedral.none
The Reverend Dr. Russell Levenson speaks at the state funeral of former US president George H.W. Bush at the Washington National Cathedral in Washington, December 5, 2018.none
Former President George W. Bush wipes an eye at the State Funeral for his father, former President George H.W. Bush.none
Former President George W. Bush shares a moment with his brother Jeb Bush and Laura Bush, center, after speaking at the State Funeral for their father.none
Columba Bush, Jeb Bush and Laura Bush listen as former President George W. Bush speaks during the State Funeral.none
Current and former presidents and first ladies applaud during a State Funeral for former President George H.W. Bush at the National Cathedral, Wednesday, Dec. 5, 2018.none
Presidential historian and biographer Jon Meacham delivers a eulogy at the state funeral service of former President George W. Bush,none
Former President George W. Bush touches the casket of his father, former President George H.W. Bush, at his state funeral.none
Former President George W. Bush touches his fathers casket after speaking during the State Funeral for former President George H.W. Bush, at the National Cathedral, Wednesday.none
Former US President George W. Bush speaks during the funeral service for former US President George H. W. Bush at the National Cathedral in Washington, DC on December 5, 2018.none
Former President George W. Bush speaks in front of the flag-draped casket of his father.none
Former president George W. Bush gives a eulogy at the state funeral of his father former US president George H.W. Bush at the Washington National Cathedral in Washington.none
Former president George W. Bush touches the casket as he arrives to give a eulogy at the state funeral of his father former US president George H.W. Bush.none
President Donald Trump, first lady Melania Trump, former President Barack Obama, Michelle Obama, former President Bill Clinton and former Secretary of State Hillary Clinton listen.none
Former Sen. Alan Simpson, R-Wyo, touches the flag-draped casket of former President George H.W. Bush.none
Former U.S. Sen. Alan K. Simpson (R-WY) delivers remarks during the state funeral for former President George H.W. Bush.none
Jeb Bush, Laura Bush, and former President George W. Bush share a laugh as a story is told about former President George H.W. Bush.none
Presidential biographer Jon Meacham speaks during the State Funeral for former President George H.W. Bush at the National Cathedral.none
Former president George W. Bush greets former first Lady Michelle Obama at the funeral of his father George H.W. Bush.none
The flag-draped casket of former President George H.W. Bush is carried by a military honor guard.none
Former President George W. Bush, center, former first lady Laura Bush, Neil Bush, Sharon Bush and Jeb Bush, arrive for the State Funeral for former President George H.W. Bush.none
The flag-draped casket of former President George H.W. Bush is carried by a military honor guard.none
The flag-draped casket of former President George H.W. Bush is arrives carried by a military honor guard during a State Funeral at the National Cathedral.none
President Donald Trump shakes hands with former President Barack Obama during a State Funeral service for former President George H.W. Bush.none
Barack Obama and Michelle Obama speak as Bill Clinton and Hillary Clinton greet Vice President Mike Pence and Karen Pence before the funeral.none
President Donald Trump and first lady Melania Trump greet former President Barack Obama and Michelle Obama as they join other former presidents and vice presidents and spouses.none
German Chancellor Angela Merkel speaks with former US President Barack Obama as they arrive for the funeral service for former US President George H. W. Bush.none
Former VP Al Gore, left, speaks with former President Bill Clinton as his wife, former Secretary of State Hillary Clinton greets former first lady Michelle Obama.none
President Donald Trump and first lady Melania Trump arrive for the State Funeral former President George H.W. Bush, at the National Cathedral, Wednesday, Dec. 5, 2018.none
Former Secretary of State Hilary Clinton, right, greets former Vice President Joe Biden, left, before a State Funeral for former President George H.W. Bush.none
Acting United States Attorney General Matt Whitaker, center, arrives before a State Funeral for former President George H.W. Bush.none
Former Canadian Prime Minister Brian Mulroney shakes hands with former President George W. Bush.none
Ivanka Trump and Jared Kushner speak with former VP Joe Biden and wife Jill, while former President Jimmy Carter (back turned) and wife Rosalynn speak with former VP Al Gore.none
Former US Vice President Al Gore(R) Vice President Mike Pence (L) and former US President Jimmy Carter(C) arrive for the funeral service for former US President George H. W. Bush.none
Mourners file into the Washington National Cathedral before a State Funeral for former President George H.W. Bush in Washington, Wednesday, Dec. 5, 2018.none
Mourners file into the Washington National Cathedral before the State Funeral for former President George H.W. Bush in Washington, Wednesday, Dec. 5, 2018.none
Former Florida Gov. Jeb Bush, left, reaches out to his brother, former President George W. Bush, right, arrive.none
Former NFL quarterback Peyton Manning arrives for the State Funeral of former President George H.W. Bush at the National Cathedral in Washington, Wednesday, Dec. 5, 2018.none
Former Secretary of State Condoleezza Rice, left, arrives for the State Funeral of former President George H.W. Bush.none
Former Secretary of State Henry Kissinger arrives for the State Funeral of former President George H.W. Bush.none
Former Secretary of State Colin Powell, center, arrives for the State Funeral of former President George H.W. Bush at the National Cathedral in Washington, Wednesday, Dec. 5, 2018.none
Rudy Guiliani, center, and other guests, arrive for the State Funeral of former President George H.W. Bush at the National Cathedral in Washington, Wednesday, Dec. 5, 2018.none
Visitors gather before a State Funeral for former President George H.W. Bush at the National Cathedral, Wednesday, Dec. 5, 2018, in Washington.none
George W. Bush and Laura Bush watch as the flag-draped casket of his father is carried by joint services military honor guard to a State Funeral in Washington.none
A U.S. military honor guard team carries the flag draped casket of former U.S. President George H. W. Bush from the U.S. Capitol December 5, 2018 in Washington, DC.none
Janna Ryan, Paul Ryan, Elaine Chao, Mitch McConnell, Iris Weinshall, Chuck Schumer, Nancy Pelosi and Paul Pelosi await the departure of the casket.none
People line Pennsylvania Ave. as the hearse passes by carrying the flag-draped casket of former President George H.W. Bush as it drives away from the Capitol.none
People line the street to see the flag-draped casket of former President George H.W. Bush motorcade to a State Funeral at the National Cathedral, Wednesday, Dec. 5, 2018.none
The hearse carrying the flag-draped casket of former President George H.W. Bush passes by the White House from the Capitol, heading to a State Funeral at the National Cathedral.none
The casket with the remains of former US President George H.W. Bush departs the US Capitol during a State Funeral in Washington, DC, December 5, 2018.none