Hi there,
This is Bogdan from Romania.
I'm a mechanical engineer, designer, modeler and inventor with over 15y experience in designing, modeling and effective manufacturing of different products, devices and systems which spans across multiple industries.
I could help with your model and I have experience in this field (I designed a new baby bottle and a toothbrush) so I knew what materials are safe to use, how to avoid edges and corners, etc., etc.(there are a lot of different issues when it comes of baby/children products).
Based on your drawings/sketches I'll do a rough model of your product. On this model, with your observations I'll make the changes/modifications until will be as you need/desire.
Once this model completed, I'll do the real parametric modeling/designing for the model and its components.
I'll deliver you 3D model in different CAD formats (ipt, iges, stl - for 3D printing, obj, etc), 3D pdf so you'll be able to open/view the model into the regular Acrobat Reader, execution drawings for manufacturing and realistic renderings.