Baby equipment

I have some questions about common products used for babies stimulation/growth/development/entertainment...

I am wanting to go ahead and purchase some items that will benefit my baby.

*Tummy time mat

*Activity gym

*Bumbo seat

*Exersauscer

*Jumperoo

*Walker

These listed above are the main ones I am curious about...

So, if you used them: at what age did you start them with each one?

How well did the product do what it was intended to do?

And

Are there any other products that you would recommend on addition or in place of these?

Any input is appreciated 😊