Victor figured out that he could dump put the blocks in the wagon & get in, so I had to pull him around for a little bit. Lots of smiles & laughs followed. Then it was Emma's turn, she also smiled & laughed. Each child having had a turn, I figured I should go back to keeping the disaster zone to the ground floor. I was stacking the cups & I heard the wagon rolling again -- Emma had gotten in & Victor was pulling her. She was smiling & Victor thought it was pretty neat. I was amazed that they figured it out. After he pushed he back into the living room, Emma got out & they both went on to play with the stacking cups I had just put away.