Can you make five differently sized squares from the interactive tangram pieces?
Is there a best way to stack cans? What do different supermarkets do? How high can you safely stack the cans?
What is the greatest number of squares you can make by overlapping three squares?
Can you make a rectangle with just 2 dominoes?
What about 3, 4, 5, 6, 7 ...?
Here's a rectangle made with 6 dominoes to get you started: