After doing some research on fun things to do indoors that don't cost an arm and a leg (well, that's not exactly what I typed into Google search, but you get the idea), I learned that a local roller rink had a dollar day once a week, every Thursday. Admission for $1/person and skate rental for $1/person. They also had rentals for in-line skates and scooters for an additional fee. So I decided to take the kids roller skating.
The first time we went, I took Jonah along. He really didn't do very well. Eliza was about that age when she first went and she loved it. But Jonah was scared of the blinking lights, the loud music, and all the people. He also was scared of the skates. I wish I had a toddler scooter for him, I think it would have been more fun for him. The older kids didn't want skates, so I told them that they could rent their own scooters if they brought the difference (skates were $1, scooters $3, so they paid $2). Eliza was brave and tried the skates.
We had a blast. We had so much fun the first time that we went twice more during their off-track time in January. Later in January, we even tried ice skating, which Eliza also loved and seemed to take to quite naturally.