Some of the best work by student inventors doesn’t come out of a lab. Sisters Tala Mousa, 17, and Farah Mousa, 15, from Gaza, found a way to turn rubble from destroyed buildings into reusable bricks. They used basic hand tools and materials they could find locally. Their project, Build Hope, Palestine, made them the Middle East Regional Winners of the Earth Prize 2026, the first Palestinian team ever to win a regional title in the competition’s history. It earned them $12,500 to develop the idea further.
What makes these student inventors worth studying is what their project demonstrates. Real engineering doesn’t need a fully-equipped lab, expensive materials or specialised machinery.
How Two Student Inventors Turned a Problem Into a Solution
The sisters are currently living with their family after losing their home. They saw rubble becoming a constant part of daily life around them. Rather than treating it as waste, they asked a different question: could it become something useful instead?
Their answer, Build Hope, starts with crushing and sieving rubble down to a sand-like consistency, using manual tools including a simple hammer. They mix that crushed material with water and a locally available binder, clay, ash, straw or glass powder. Then they pack the mix into a homemade wooden mould. The blocks stay in the mould for two days, then dry outside it for another five, about a week in total. The result is a non-load-bearing block for uses like garden beds, pavements and partitions, a local resource made from a local problem.
They didn’t develop the process alone. Their grandfather, who had relevant hands-on experience, helped them work out the practical details. Knowing who to ask, even within your own family, is as much a part of engineering a real solution as the idea itself.
The Engineering Behind These Student Inventors’ Method
Rubble-and-binder blocks work on a similar principle to older, low-cost building methods like adobe or rammed earth. Builders compact an aggregate with a binder and let it dry into a solid, non-structural material. That’s general context, not something reported about Build Hope specifically. But it shows why the sisters’ method isn’t a shot in the dark. Crushing material into finer particles is a well-established way to help a binder hold a mix together more evenly, though the final strength depends on far more than particle size alone. None of this needs a laboratory to understand or apply. It’s a principle low-cost construction has used for a very long time, aimed here at a new source material.
Student Inventors Who Built to Be Taught, Not Just Used
What sets these student inventors apart from a one-off invention is their plan for the prize money. Rather than simply producing more bricks themselves, they intend to run hands-on workshops training around 100 young people. Their goal is to produce at least 200 blocks. The sisters hope those trainees will go on to teach others too. They’ve said they want to eventually reach over 1,000 people, though that’s an intended outcome, not something that’s happened yet.
Design for others to repeat it, not just for yourself to finish it.
A lot of strong projects stop at ‘I built something that works.’ Fewer take the extra step: building something other people can build too. If you’re planning your own project, ask yourself directly. Is what you’ve made something only you can do? Or something you could hand to someone else, and watch them succeed with it?
The Honest Limits of the Idea
Build Hope solves a real problem, but not the whole problem. The blocks are non-load-bearing. As things stand, they can’t replace the materials needed to rebuild homes. They only support secondary uses like paving, partitions and garden beds around that rebuilding.
A resource-limited setting is a design constraint, not a disqualifier.
Ask people with relevant experience, even close to home. The sisters didn’t need to look far for expertise. Their grandfather’s practical knowledge filled a real gap.
Build Hope makes both points at once. The constraints shaped a genuinely useful design. The sisters also built that design from the start so they could hand it to someone else. Either lesson works on its own. Together, they’re what actually made this a prize-winning project rather than just a resourceful one.
For more student-led invention stories, see our Young Scientists section, including how one science fair project turned a dead end into a prize-winning idea.