Educational Insights Hot Dots Science Set Matter & Energy An independent, self-paced way to practice key science concepts and vocabulary! Set includes 36 double-sided, fully-illustrated cards featuring 72 science questions. Questions cover properties and states of matter, types of energy, electricity, building blocks of matter, mixtures and solutions, and sound and light. Use as basic flash cards or add the Hot Dots Talking Pen (not included) for instant reinforcement. Touch the pen to an answer dot for positive reinforcement (correct responses) or gentle redirection (incorrect responses).