Depending on the material you should consider the density of the bulk material, because this determines the weight. 80 litres of wet topsoil are significantly heavier than 80 litres of aerated concrete blocks. The maximum load that the wheelbarrow can withstand must be taken into account. Normally, however, the load capacity of the product is higher than the load you can move at all.
The width varies depending on the capacity and type of wheelbarrow. With some products, the trough is narrower but deeper, so that you can fit through almost any door.
This version of the wheelbarrow saves time and energy when pushing and is particularly suitable for working on uneven terrain with slopes.
You can find more information on this under "Motorised wheelbarrow".
For younger children, small, colourful models with a low handle and loading height are best, as they can then easily load and unload the wheelbarrow and push it around the garden without any problems.
For slightly older children, larger children's wheelbarrows that are sturdy and heavy duty are ideal. With these models, they can carry a decent amount of bulk material. You can usually recognise such wheelbarrows by their pneumatic tyres and sturdy material.