Shovel already worn out after 3 days

My son, 18 months old, loves construction and dredging about everything. After I had lent him in the toy library, the Lego Duplo Bob the Builder excavator and bulldozer and he took this even in the bath and to bed, we realized that we had to buy a replacement before the return date!

So we ordered the Lego Duplo excavators and were also very pleased with him. When our child it was love at first sight. Which is a shame, however, and we and our son is frustrated that the bucket play on after only 3 days no longer remained above but immediately folded down if you want to put them up. "Genuine" excavator games is no longer possible. If you look at the joint can also be seen that the locking grooves are not consistently applied within, but about half of the surface is smooth. Whether this is intentional or it is a manufacturing defect is not clear to us - the scoop, however, would certainly keep better if these grooves were consistently inside the joint.

That is why we awarded 3 points, but otherwise the excavator is very nice and comes with many extras (pylons, wrench, barrier, paddle etc.)