Stop Tip-toeing Around Toe-walking

Inclusion Criteria for TD children: * between the age of 7 and 18 years * who are typically developing * able to stand and walk alone without using assistance or assistive devices * able to place their feet flat on the force platforms * with enough German language skills to follow the instructions Inclusion Criteria for sCP children: * between the age of 7 and 18 years * with the diagnosis of spastic CP or CP similar (both unilateral and bilateral), functionally classified level I or II according to the Gross Motor Function Classification System (GMFCS) * being able to stand and walk alone without assistance or assistive devices * able to place their feet flat on the force platforms * with enough German language skills to follow the instructions Exclusion Criteria for TD children: * severe visual, cognitive, or auditory impairments that would interfere with the study instructions and the VR immersion * any vestibular problems (e.g. severe motion sickness) * history of epilepsy, pace-marker or/and electrical pumps (due to possible interference with electrical stimulation) * prior experience of VR to ensure a comparable baseline between subjects Exclusion Criteria for sCP children: * severe visual, cognitive, or auditory impairments that would interfere with the study instructions and the VR immersion * severe knee flexion gait (\>45°) * walking capacity \<50m * botulinum toxin type A treatment (past 6 months) * orthopedic surgery of upper or lower extremities (past 12 m…