Willa's late,
They locked the gate
She didn't run
and missed the fun,
but here's her homework...no harm done
Nine minute eggs
Start both timers at the same time (Call the 7 min, 'Big' and the 4 min, 'Little').
After 4 min, Big has 3 min of sand left and Little is at zero. so we must flip Little a second time.
After 3 min, Big is now at zero and there's still 1 minute left in Little. (7 minutes have elapsed) Flip Big.
While (eight) minute from Little elapses, Big is dropping its own minute of sand on the bottom. and has 6 minutes of sand remaining on top ( at this point, 8 minutes have elapsed).
Flip Big so that 1 min of sand is now on top and the other six on the bottom. Now you can measure your extra minute and that's how you get to minute 9.
How do you acknowledge Easter.