Pocket Brainteasers 4-Piece Jigsaw is one of the most fun new stem toys for boys and girls, and if one of the best gifts you can buy for kids who like smart games and a challenge. Separate the 4 jigsaw puzzle pieces and put the puzzle back together again. Pocket Brainteasers 4-Piece Jigsaw is made with high quality components and is very easy to get started - you'll be able to start solving it within minutes of opening the box. Pocket Brainteasers 4-Piece Jigsaw is built to develop critical thinking skills, all through hands-on fun problem-solving.