We have given the wheel of our daughter for Christmas. Structure was simple. But what I noticed immediately that the handles and tire smell quite unpleasant. From my experience smells plastic / rubber only so if plasticizers are included, which are often carcinogenic. The tires are not quite as schmlimm (although something reingehört in any product, let alone in a product for children), but in the handles I became suspicious. When push my daughter I have the handles of course a little for themselves and then used (max. 3 min) smelled my hands even after the plastic. Since children often take their hands in their mouths and go through the face, I find that very worrying. I have already written to the manufacturers and called for a Stellungnachme. Once I have an answer, I'll give this one the best. Until then, I'm going to use the wheel nich and if the answer unbefriedingent fails, I will reclaim the wheel.