The Bob the Builder 4-in-a-Box Jigsaw Puzzles pack is the perfect present for fans of the TV show. Its a great way for kids aged three & up to improve their observation & problem solving skills, & there. s a choice of 12, 16, 20 & 24 piece jigsaws to work on as they get more confident. The four colourful puzzles feature Bob, Wendy, Scoop, Muck, Roley, Lofty & the rest of the gang, & measure 19cm x 14cm when they. re completed.