For some reason my students always seemed to panic when they saw an input/output table for the first time. I decided that I needed to create something "fun" to introduce the concept of input/output tables that was interactive and kid-friendly, and that is where the "What's My Rule?" bear came from.
The students work in groups to complete the table and identify the rule. We then work together to create an equation using two variables. I gradually guide them and have them complete the tables on their own, finding the rule and creating an equation to match it.
I've found students are much more confident tackling the tables because they have already solved problems just like it in a fun way! You can find a Smartboard presentation involving addition/subtraction input/output and another one involving multiplication/division input/output tables at my TpT store here.