For equal signs, you might want to try visually using a ruler on a fulcrum. Two objects on either side get the balance you are talking about and then you even do simple algebra by moving objects about eg two objects at 5 = 1 object at 10 to balance the ruler… etc.
Would the Tower of London be that price for foreigners too, or just UK citizens?
I don't have any plans to visit London in the near future, but it IS on my bucket list, and you never know...
For equal signs, you might want to try visually using a ruler on a fulcrum. Two objects on either side get the balance you are talking about and then you even do simple algebra by moving objects about eg two objects at 5 = 1 object at 10 to balance the ruler… etc.