Stack, pattern and match the multicolor shapes, but don’t be fooled by these endlessly enjoyable blocks mean brain-boosting business. ANALYTICAL & CRITICAL THINKING SKILLS: Mental Blox help children practice following verbal instructions, asking questions and build critical thinking skills. Activity cards provide children with examples of what to build. 40 PIECE SET: This logic game includes 20 chunky plastic blocks, 20 activity cards, an activity guide and features four different shapes and three different attributes for a real challenge.