Learning Resources Hot Dots Learn at Home Reading & Maths Set 1, Ages 5+. Hot Dots is a unique self-paced learning system thats ideal for independent maths and literacy practise at home. Each of these sets includes a maths activity book, literacy activity book, and Hot Dots Light-up Interactive Pen. There are 100 pages of activities per set to keep kids busy and learning. To use, children simply press the Hot Dots Pen tip to an answer dot for an immediate sound and/or light response. The pen flashes green lights or encouraging sounds for correct answers, and red lights with gentle redirections for incorrect answers. Pen measures 14cm L. Requires 2 AAA batteries, not included. 3 Piece Set