When working with an 8-month-old child with poor dynamic sitting balance, what is the most beneficial positioning for activity?

Positioning the child between the therapist's extended legs while alternating the placement of a covered toy is particularly beneficial for several reasons. This position provides a stable base of support while still allowing the child to engage in active exploration and reach for the toy. It encourages the development of dynamic sitting balance in a safe environment, where the therapist can provide both physical and verbal support if necessary.

In this position, the child can practice shifting weight and adjusting their posture as they reach for the toy, which enhances core strength and stability. Additionally, being close to the therapist allows for immediate feedback and assistance, promoting a sense of security while encouraging participation in the activity.

The other options have their merits but may not fully support the developmental needs of the child in this scenario. For instance, placing the child in a high chair limits movement and may not challenge their balance effectively. Having the child sit unsupported on the floor could pose a risk of falls and does not provide sufficient support as they work on their balance. Using a therapy ball may enhance balance, but it requires the child to engage in more advanced balance strategies and may not offer the same level of security and support as the chosen option.