Keep Your Brain In Shape – The puzzle pieces of IQ Twins are 2 peas in a pod, but not 2 of a kind! 10 puzzle pieces form 5 colour pairs. One piece will only fit on the board at 90° angles, while its twin requires 45°. Are you ready for this brain-training puzzle? On the Go – A great travel game which includes a portable case! Take on holiday and in the car! Develop – Perfect for children and adults, our IQ games stimulate cognitive skills such as concentration, problem solving and more! Brain-Challenging – Progress through the booklet featuring 120 challenges from easy to expert!