Create A Dropdown Help Menu In A Block

General General Questions
1

I have searched the market place but am looking to create a custom block where I can then add a dropdown help menu similar to this page here.

https://www.workweargiant.co.uk/Polos/PolycottonPolosPlain/UneekOlympicPoloshirt

(please click on add logo) then see box on right

http://prntscr.com/g3x2c3

Anyone know how or where to find one, or can create one for me

thanks

John

2

Please find examples in the web. E.g.

https://www.w3schools.com/howto/howto_js_accordion.asp