The definition of impromptu:
"Prompted by the occasion rather than being planned in advance."
On the way home from Chuck E. Cheese we stopped by Shannon's house to see if she wanted to come stay the night and go to church with us the next day. We wound up bringing Shannon, Sarah, and Anna home with us!
They got to help us make and decorate cupcakes for Kevin's birthday. Then they blew up his balloons and we used them to play some games. We tied them to the girls' legs and they ran around the basement trying to stomp and break each other's balloon. Then they had a race to see who could sit on one and pop it the fastest. Danya won both times! We didn't plan to have a party on Kevin's birthday, but it ended up being alot of fun!