What software is used for modeling?

If there is no shockproof, the handle is not suitable for making such a hard handle. The rubber foam is better. The upper cover of the rear wheel feels easy to be trampled. If it is for braking, I didn't say haha. The groove where the foot is placed is not very reasonable and feels a little slippery. It is better to add some anti-skid texture stripes. If the visual center of gravity is not very suitable, the color or shape ratio

Can the groove be difficult for children's feet to put?

The male mold for the handle and knob adjustment buckle, but the design of the pedal and front is quite creative and childlike.

The chamfer on the model is not well inverted. The chamfer in that place should be mixed chamfer in rhinoceros, otherwise the pedal is not good-looking there.

The first color scheme looks good.

What is the function of the card slot below?