Worddle are a very interesting way to engage the students in French grammar while keeping the lesson interactive, interesting and colorful! Give the students many choices and even allow them to create the Worddle on-line or by hand as either way elicits reading and writing in a foreign language.
The teacher can chose any French grammar rule or use French adjectives to BUMP UP the way the student presents him/herself at the beginning of the year or anytime as an oral language review.
In my intermediate FSL/FLE class we are studying French poetry which gave me the opportunity to allow the students to complete their Worddle on a French poet or French poem... Tres Cool!!