Since Biscuit loves tunnels so much, we had a little playtime in our own kitchen citadel. We used chairs with backs facing each other and space in between covered with a blanket as the roof and walls. Chair cushions became the "drawbridge," megablocks served as water in the moat, and we made sure to have a sea critter we called Nessie guarding the stronghold just for fun. Biscuit made many appearances as the returning king :)