In PubMed, Toys = "Play and Playthings"[Mesh] 

(("Nervous System Diseases"[Mesh]) AND "Nervous System Diseases/rehabilitation"[Mesh]) AND "Play and Playthings"[Mesh])

then filtered by Age: Child:birth to 18 years

168 articles showed up in this search.  Most of them are Wii, Nintendo, Kinect, etc.  Others include structured play groups, as well as ordinary and adaptive toys.

One early (1986) interesting article is Murphy G, Carr J, Callias M. Increasing simple toy play in profoundly mentally handicapped children: II. Designing special toys. J Autism Dev Disord. 1986 Mar;16(1):45-58.  

Looking at related citations in PubMed brings up  

Hsieh HC. Effects of ordinary and adaptive toys on pre-school children with developmental disabilities. Res Dev Disabil. 2008 Sep-Oct;29(5):459-66. 

and 

Greaves S, Imms C, Krumlinde-Sundholm L, Dodd K, Eliasson AC. Bimanual behaviours in children aged 8-18 months: a literature review to select toys that elicit the use of two hands. Res Dev Disabil. 2012 Jan-Feb;33(1):240-50. doi: 10.1016/j.ridd.2011.09.012.  

Hope this is useful.

www.cptoys.org

Hi Emilia,

Here are some references,

Robotic neurorehabilitation: a computational motor learning perspective

Vincent S Huang* and John W Krakauer

Robotics in neuro-rehabilitation.

Pignolo L.

J Rehabil Med 2009; 41: 955–960

European Network on Robotics for NeuroRehabilitation

http://www.rehabilitationrobotics.eu/

http://iuhealth.org/rehabilitation/neurorehabilitation-and-robotics/

Dear all,

thanks a lot - your help is very useful,

Regards,

Emilia

Research concerning video games and virtual reality for children from age grp of 3 yrs can be useful regarding improvement of balance, co-ordination, motor function and cognitive development.