• Book a session slot, since jumps start on the hour with at most 20 people and 15 bookable places; walk-ins get in only when there's room
• Adults pay to jump too: preschool-age kids must have their own adult with them on the trampoline area, and that adult needs a ticket
• Grip socks and long pants, as bare feet aren't allowed and stretchy long pants prevent friction burns; only water bottles go on the trampolines

Woltti is a trampoline and acrobatics hall with eight Eurotramp trampolines inside a safety net. Three bounce onto a Bagjump airbag, two face a wall for wall jumps, and one has a spotting rig with a flip belt. Kids also climb to platforms to drop onto the airbag and swing from a trapeze. A mirrored floor room has an Airtrack and roll mats for tumbling, handstands and juggling.