blender wagon 1

add a plane, e to extrude

add a circle, f to fill, e to extrude, i to inset, x to delete faces

alt + edge select inner circle, f to fill

i to inset, select 8 spokes, p to separate, x to delete faces

object convert spokes to curve, object property -> geometry -> increase depth

alt + edge select axis circle, f to fill, e to extrude

object convert spokes to mesh, shift select wheel, ctrl + j to join

add mirror modifier for wheels

select base plane, shift + d to duplicate, p to separate

select separated plane, s to scale, e to extrude, s to scale

ctrl + r to loop cut, select middle line, turn on proportional edit

g + z to move, select 3 loop cut lines, ctrl + b to bevel

reference:

https://www.youtube.com/watch?v=70t8Tp8LgD8