My 4.5 yo DD has autism, including sensory processing stuff, language problems, stubbornness and general unwillingness to comply with social requests.
We both have to work full time out of the home, and DD is thankfully at a great in-home daycare run by a retired special ed teacher. They understand DD and adore her.
However, she has taken to pushing over some of the smaller toddlers over the past few months and has really hurt some of them. Daycare providers now stay right by her side so they can quickly intervene if needed, but 1) this is really taxing for them to be on pins and needles about her, and 2) they can't always be right by her side every second.
When she's having an aggressive streak, and is not being responsive to verbal instructions or gentle re-direction, they put her in a high chair to separate her from the situation and keep the other kids safe, but this option isn't ideal because she's getting too big for it and they are worried she will tip the chair over.
We/they are working with DD for permanent behavior change, but that is apparently going to take a while. Until then, we need a good, safe, stable, and AFFORDABLE way of physically containing her for about 15 minutes so she can calm down and daycare can finish attending to other duties with the other kids (e.g., pottying, diapering, feeding, etc).
We really need to make things work with daycare - she gets HUGE benefits from being there, including special ed instruction, peer modeling, social skills practice, and a lot of love from people she has bonded with.