“…Children can express their preferences by attaching items representing the products under investigation to the Velcro. The Paper Ladder is an adaptation of the latter (Sylla et al, 2017(Sylla et al, , 2018, being easier to produce and use, since the paper version favors the handling of the pieces by the children who can relocate and review their choices easily following their preference (Sylla et al 2019). The Five Degrees of Happiness (Hall, Hume, & Tazzyman, 2016), uses emojis to evaluate children's perceptions of a product.…”