Children’s tv lyrics 80/90s

[Spare tyre]

Been talking to a old school friend about something we watched on tv at infant school (on vhs I reckon)

Was late 80s early 90s, opening lyrics were

rides fast
rides slow
watch the rides whizzing by/past
whats inside the crystal ball
Will the ? Rise or fall

Any idea of the program

I will donate £1 to the winners virtual beer fund, maybe.