This is a common question to hear from Ethan right now. He is counting everything lately and every time we go to the bank (God has granted those nice ladies with lots of patience) he has to get the 100 book from the kids bin, and count each rubber duck out loud until he reaches #100 for who ever is working at the bank. He is very proud of himself to say the least!
To harness this desire to count, I created a lesson where he gets some writing practice in as well. I printed the worksheet and had him fill in the blanks with this missing number. After he finished this, he cut out each square, mixed them up, and then ordered them on the table.

We started with 1-30, then he wanted to go further, so we ended up ordering all the number squares from 1-100.

While Ethan was busy working on his lesson, Everett practiced walking around the chairs.