Participants A convenience sample of 16 children will be recruited at the Cerebral Reference Centre of the University Hospital Pellenberg. Children will be included when they are diagnosed with bilateral spastic CP, aged between 4 and 9 years and a Gross Motor Function level between I and III. Children are excluded when they received Botulinum Toxin A injections within the past six months, orthopedic surgery in the past or had severe associated problems that limited participation to therapy (blindness, deafness, severe cognitive limitations or autism).