What is this?
skeleton
shell
ladder
tree trunk
What is this?
nest
cave
arch
beaver dam
What is this?
bridge
castle
arch
house
What is this?
arch
cave
tent
pillar (column)
What is this?
shell
nest
eggshell
cave
What is this?
basket
nest
tree trunk
tree house
What is this?
nest
arch
tree trunk
beaver dam
What is this?
castle
bridge
pillar (column)
arch
What is this?
castle
arch
bridge
ladder
What is this?
box
book
basket
bag
What is this?
tree root
tree branch
tree house
tree trunk
What is this?
eggshell ( shell )
nest
skeleton
cave
What is this?
pillar
arch
bridge
cave
What is this?
arch
stairs
ladder
bridge
What is this?
arch
ladder
bridge
stairs
What is this?
nest
basket
tent
arch
What is this?
arch
stairs
castle
pillar (column)
What are these?
pillar
bridge
ladder
stairs
What is this?
box
book
basket
bag
What is this?
ladder
basket
castle
stairs