Thomas the Tank Engine Birthday Surprise Puzzle. Happy Birthday Thomas! Sir Topham Hatt has a very special birthday surprise for Thomas. This puzzle will be a perfect birthdya gift for your little Thomas lover. This giant floor puzzle comes in a shaped box with 24 large puzzle pieces, which makes it easy for little hands to hold and do. Ages 3 and up. Finished puzzle size 27 x 19.5 (inches). Ravensburger puzzles are of a great quality with pieces that fit! Handmade cutting tools ensure that no two pieces are alike. Grained paper ensures glare free picture. Strong pieces that don't break. Made from special recycled board.