Text Message Effects On iPhone 6S- Help, won’t work

Pls Help. I want to send effects (Bubbles, Confetti etc...) on my iPhone 6S w/updated software— but somehow I cannot make this function appear no matter how long I hold the arrow prior to sending. What are the Settings in Accessibility that allow Text Message Effect to pop up- (Somehow I think I messed up Settings while tweaking features). It used to work a month ago? I have T-Mobile, and have spent hours changing Motion On-Off, Hold lengths Up/Dwn, Assistive Touch On/Off... Nothing works. If someone can tell me what are the Settings Needed in ‘Accessibility’ to make Txt Effects work- Is be extremely grateful. Thx