Our objective is to provide a novel habilitation experience using play to children with special needs, in particular to those with congenital defects of the upper limbs. Our concept is a device-assisted motivational training session using tangible building block devices. In order to verify the feasibility of our concept with used bioToys in a clinical training session with occupational therapists. Our participant was a one-year-old girl with congenital amputation of the right upper limb. We verified that bioToys could be used in clinical training for a prosthesis, and could assist with both playful training and quantitative therapeutic evaluation.