On Matt Parker's awesome YouTube channel, Stand-up Maths (https://www.youtube.com/watch?v=e1Kw3yJoNxw) he designed and built a Cogputer based on how Logs can be used to turn multiplications into additions. Watch the YouTube video for more info.

This is a simple Christmas tree and gifts that can be used to multiply two single digit numbers. Stack the two gifts to be multiplied, one on the other, on the platform at the base of the tree. Their multiple will be shown but the number that matches their height.

Tree and gifts are my design, but all credit for the position of the numbers goes to Matt Parker.