Children's less affected hand was restricted through a mitt with a material sewn shut on the palmar face to promote the use of involved side as maximum as possible. Besides, if the participant attempted to use his/her less affected hand as an assistive, a bandage was also used to strap less affected upper limb to the trunk. Specific activities were selected according to deficit of interest, participant preference (on the condition of having potential effects on hand skills) and parent/guardian, or their teacher's request (e.g., drawing, painting, and eating). In case of activities requiring both hand use, such as stabilizing paper during the painting or holding the bricks of lego on the ground, the treating physiotherapist undertook the role of the child's dominant hand.

BIT was administrated without any restrictive material on the non-involved upper limb, but instead, children were engaged in age-appropriate gross and fine motor bimanual activities. All targeted deficits of interest were addressed within the context of the selected activity.

Children's less affected hand was restricted through a mitt with a material sewn shut on the palmar face to promote the involved side's use, and unimanual gross and fine motor activities were practiced with the more affected hand. Besides, if the participant attempted to use his/her less affected hand as an assistive, a bandage was also used to strap less affected upper limb to the trunk. Specific activities were selected according to the deficit of interest, participant preference (on the condition of having potential effects on hand skills) and parent/guardian, or their teacher's request (e.g., drawing, painting, and eating).

The Upper Extremity Skills Test (QUEST) is a criterion-referenced measurement tool, developed to evaluate upper extremity quality of movement in children with cerebral palsy.The Upper Extremity Skills Test has been validated for children with cerebral palsy aged 18 months to 12 years. Intra-rater reliability of the QUEST has been indicated to strong (ICC=0.96) in children with cerebral palsy aged eight and over.

ABILHAND-Kids is developed for children with cerebral palsy and measures a child's ability to manage 21 daily activities that require the use of the upper limbs. It measures the children's typical performance in daily life. ABILHAND-Kids is useful in reporting the functional performance of children with one affected side in the perspective of manual ability and has excellent test-retest reliability for Turkish children with cerebral palsy (ICC=0. 0.98)