Bumprider sit is guaranteed to fit 100 of strollers setting it apart from any other stroller board currently on the market suitable for children aged between 2 5 years old approx it features a handy detachable seat giving children the option to either to sit or stand perfect for tired little legs simple to install and with no tools required family trips out will be a walk in the park features suitable for children from 2 5 years old approx weighing up to 20kg large standing platfo