Spot's Birthday Party. Join in the fun of Spot's birthday party in this bestselling Spot lift-the-flap book. Great for teaching prepositions 'in', 'under', 'behind'. child 12-18 months follows simple directions 'open the flap'. child 2-3 years uses 'on' 'in' 'under'. child 36-42 months is able to answer 2 questions about a short story heard.