Block By Block- Picture 3 dimensions in your mind's eye; now imagine a 7 piece stacking puzzle that asks you to match 60 different patterns! Block by Block helps players sharpen their spatial thinking skills and have fun at the same time.
This Secret Message Writing Set is super cool! The cap of each pen contains a power 'Black- Light' UV beam, which illuminates the message. Each pen contains invisible ink, UV lamp, 4 x batteries for battery life!