Yes, one child can often ride twice using Disney's Rider Switch service, but there are specific limits. The system is designed for parties where one person cannot or does not want to ride (usually due to height requirements). If you have two adults and one older child who is tall enough to ride, the older child can ride once with "Adult A" while "Adult B" waits with the non-riding guest. When the adults swap, the older child can use the Rider Switch entitlement to ride a second time with "Adult B." However, Disney's 2026 policy generally limits the number of people who can "re-ride" with the second adult to one additional guest. This allows the second adult to have a companion so they don't have to ride alone, effectively giving that one "lucky" sibling two turns on attractions like Space Mountain or Rise of the Resistance.