"Do you want to swing/see-saw/slide? I want to see-saw/swing/slide." I don't hear these options. But I can imagine that a parent might say it to a little child to avoid using too many words. In context, the meaning is clear. I want to hang from the bar (for example, to check how much time I can hold myself to the bar) = I want to play on the bar - BOTH GOOD Hold on to the handrails = Hold the handrails ? BOTH GOOD but we would probably not use "handrail" for playground equipment. Handrails are for old or infirm people to help them go up and down stairs, for example. You may find that US speakers use different terms and expressions.