This Box Includes 20 Colorful Sets Of Sequencing Puzzle Cards To Provide Children With An Introduction To The Ordering Of Life Cycles And Events. Each Card Set Introduces A Life Cycle Or Event That Needs To Be Ordered From Left To Right. The Cards Are Self-Correcting As No Two Puzzle Cuts Are The Same. Match It! Sequencing Teaches Cause And Effect And The Basic Elements Of Reasoning In A Fun And Easy Way. Ages 3+.