How things work：with over 90 flaps to lift Look inside a farm：with over 50 flaps to lift Under the sea：with over 80 flaps to lift See inside Science：with over 50 flaps to lift First 100 words : over 60 flaps to lift Look Inside Space：with over 70 Flaps to Lift See inside noisy castles：with over 50 flaps to lift Look Inside Things That Go：with over 60 Flaps to Lift With over 90 flaps to lift On shaped board pages with over 60 flaps to lift.