Lakeshore Learning Number Rockets - 1 to 20Blast off into early numeracy with this exciting set of Number Rockets 1 20! Designed to engage young learners in a hands on, visual approach to number recognition and counting, each of the 20 rockets features three interlocking pieces representing the same number in different ways numerals, quantities, and visual symbols. Children build each rocket by matching these representations, reinforcing their understanding of one to one correspondence, number