Interactive suggestion: Number Counter

[eAlasdair]

A new interactive based on Binary Cards but expanded to cover all bases (decimal, hex, etc)

Purpose:
Resolve shortcomings when showing non-base-2 numbers with Binary Cards, in order to:

1. Help show (n-1) base-n + 1 = 10 base-n
   i.e 9 + 1 = 10, F + 1 = 10, etc
2. Show a visual demonstration of how counting works in our usual decimal system and how it applies naturally to other bases.

Design:
A split-flap display.
In base 2 it would work exactly like Binary cards; in base-n each digit in the represented number would have a set of n numbers to flip through.
The user can 'flip' each set as they wish to count up or down.
A representation of the number would be shown in the base used as well as in decimal