Recommended educational toys The key to developing intelligence is intellectual development. Educational toys can help children think actively and develop their potential. The following are recommendations for a complete collection of children\’s intellectual development toys. 1. Jigsaw puzzle toys are very classic intellectual development tools. They improve children\’s spatial analysis skills and creativity. Children can learn skills such as sorting, sorting styles and colors. Jigsaw puzzles are available in both fixed and free forms. Fixed jigsaw puzzles are made by separating and assembling preassembled puzzle pieces individually.