They can carry kids ages 1 to six years. A few models carry one child; others can bring . All models have a weight restriction that tiers from 85 to one 125 kilos (this variety sounds quite high for kids who are most effective 1 to six years antique). But some hight weight limit trailers are in the market so they can manage the weight limit best is Burley, Thule in that quality bike trailers.