---
title: The law of effect
description: "Design and development of the Grip interactive awareness-raising platform: The Law of Effect"
url: "https://kffein.com/en/projects/grip-la-loi-de-leffet"
date_modified: "2026-10-18T11:37:17-04:00"
---

 *Version française : [La loi de l'effet](https://kffein.com/fr/projets/grip-la-loi-de-leffet)*

# Project: The law of effect

**An interactive microsite where users don’t just read about prevention, they experience it firsthand**

For a GRIP and the Tam-Tam\\TBWA campaign, Kffein developed thelawofeffect.info, a Webflow experience aimed at 18- to 24-year-olds. The site features an animated, interactive quiz that translates the concept of the “effect law” into information you move through instead of scroll past.

- **Client:** GRIP — Groupe de recherche et d'intervention psychosociale
- **Category:** Webflow
- **Year:** 2024
- **Website:** <https://thelawofeffect.info/en>

## A Platform That Speaks to Youth, Right Where They Are

To support an awareness campaign led by Tam-Tam\\TBWA, GRIP needed a digital tool that could quickly deliver a prevention message to 18- to 24-year-olds. Kffein designed and developed the interactive microsite laloideleffet.info, a Webflow experience built to engage, not to passively inform.

## Context and challenges

**Context**  

GRIP has long been a player in nightlife settings, equipping young adults with tools and resources to help them navigate psychoactive substance use free of judgment. The "effect law", the psychology principle that states that a substance's effects depend on the individual, the substance, and the context, is central to their educational model. In 2024, GRIP launched a multichannel campaign with Tam-Tam\\TBWA. But a key piece was missing: a digital platform that could bring this message to life.

**Challenges**  

Our challenge wasn't just to build a website.. It was to create a quick and memorable digital experience that young adults would actually want to engage with, a one-page website design that ensures this public health concept lands on an emotional level, not just an intellectual one.

## Our approach

The laloideleffet.info microsite is a Webflow one-pager built around a single objective: to guide visitors through a journey of their own consumption habits, in just a few seconds. The experience is centred on an animated, interactive quiz, where each answer progressively reveals the three pillars of the effect law: the individual, the substance, and the context.

Instead of relying on passive scrolling or linear reading, we designed a site designed to grab a user’s attention that recreates platforms with rapidly-scrolling video and motion. Developed on Webflow with a focus on microanimations and mobile fluidity, the site seamlessly integrates into the campaign aesthetic without diluting its message.