You can check her current toy selection online at the TeleToyland Carousel.
In addition to it being a live web project that you can play with, it has two other interesting maker features: It uses a regular hobby servo to drive a much bigger load, and we used small magnets to attach the carousel to the base so it can be removed and replaced easily - it just magnetically snaps on and off.
Step 1: The Carousel
Note that we had originally tried a metal lazy susan bearing, but in testing, it seemed to lock up. Maybe we got some junk in the ball bearings. We did use oil etc. to no avail. So, we went to the local store and found a wood lazy susan in the kitchen department. We replaced the metal bearing with that, and it works great. We should have just started with that first instead of the MDF wood circle, but since we had the other circle already cut and dowels glued on, we just put the existing one right on top.
Step 2: The Servo Drive
First, we modified it for continuous rotation. You can find out how to do that in other Instructables and numerous web sites. You can even buy pre-modified ones at a lot of places.
Then, we attached a Lite Flite wheel to the servo horn, and made a bracket to let it swing back and forth. To attach the wheel, we drilled the hole in the center of the wheel (the hub) a bit larger to allow for the servo horn screw. Then we sanded down the hub ridge, and used a couple self-tapping #4 bolts in pre-drilled holes to hold the horn to the wheel.
We made a custom hinge to allow the wheel to move back and forth to compensate for irregularities in the platform circumference.
We used a cup hook on the base and a small spring to the servo to keep the tension on. The spring goes from the cup hook to the servo mounting holes opposite the custom hinge. We did try a rubber-band before the spring. It worked fine, but after a couple months it broke, so the spring should require less maintenance.
(Note that the pictures below were taken before we used the kitchen turntable, so that is missing from the pictures, but is in the final project.)
Step 3: The Base
Since the Carousel is viewed from a web cam, we added a curved board behind it to hold a curved poster board with a background scene on it. We made the curved part form some 1x10 pine, and attached it with a 1x2 cleat.