All I could think about was the excitement of rides like these.
All I could think about was getting sick!
The best thrill rides are the highest and fastest - you get thrown around more.
I remembered what it was like on the corners - I was always afraid of being thrown out!
Loop the loop rides are just amazing - although I'm still not sure why you don't fall out when you're upside down.
I thought a kids' roundabout was pretty tame. But I did see that the principles were the same as a corkscrew thrill ride.
The only way to approach this experiment is to be very careful - to be very systematic. There is a lot going on and you have to work it out one step at a time. Alter just one thing at a time and see what happens to the velocity. Then change something else. Work through a number of combinations and see what happens to the velocity. The final answer is not the velocity itself but it is some combination of mass, velocity and radius - but it's not a simple combination.
If everything else stays the same, then the smaller the radius, the faster the blob revolves - just like the roundabout!"

It's pretty obvious that there is a force trying to push the blob outwards.

When you are a kid playing on roundabouts you just don't think of the physics. But I do remember that we did fathom out how to make it go faster and slower - particularly if we worked together."
Heavier things move more slowly.
I know that the outward force - the centripetal force - gets larger with a bigger blob or when it's moving faster. I even know that the force gets smaller as the radius gets bigger. But I can't find the exact equation which relates them all together.
Here are some comments from other pupils and teachers that may help you to investigate.

Centripetal Force