Stacking coins, especially 50-cent pieces, can be quite a challenging feat due to their weight and shape. A standard 50-cent coin in Australia has a unique dodecagonal shape, which can make it tricky to balance. If your mum can stack more than seven of them successfully, that’s impressive! It usually requires a steady hand, patience, and perhaps a bit of practice to achieve such a height without the coins toppling over. It’s great to see someone take on such a fun little challenge—perhaps you could even time her or see how high she can go!