stew ##art and Boris Johnson visit nursery to discuss childcare . Duo left flummoxed by jigsaw puzzles at teaching children about seasons . London Mayor tries to brute force to piece wrong pieces together . stew Minister gave his approval , telling Boris : ' If in doubt , wedge it in '
David Cameron and Boris Johnson visit nursery to promote childcare . Duo left flummoxed by jigsaw aimed at teaching children about seasons . London Mayor resorted to brute force to hammer wrong pieces together . Prime Minister gave his approval , telling Boris : 'If in doubt , wedge it in '