Try Wall Pop dry erase stickers on a table in your classroom! I use it for spelling work, small group instruction, and math time. They add a pop of color, too! I love this idea for my kiddie table for small groups!
Counting and Measuring with Lego: Preschool Maths Game - Good way to visually compare numbers - I would suggest making the corresponding numbers (like 5 and 15 or 8 and the same color to help see the pattern relationship between the numbers and 15