We all know this...
But, it never hurts to keep in mind...
I actually had one of those fake hypodermics in a "toy" Dr's kit as a child.
We had all sorts of toys that were quite unsafe back then.
One favorite, I remember, was a "vacuform".
It had a heating element and a suction device...
Thin colorful small square plastic sheets.
Some items to mold were supplied, but you could find your own...
You placed the plastic sheet in grooves on the top...
And, the item on the heating element..
Pressed the handle down and...
The smell of burning plastic wafted throughout the room...
Especially in the nostrils.
One would often burn fingers.
But, it was a fun toy.
You could form both sides of a mold and glue them together.
With highly toxic glue, of course.