Add the water and sugar to a small saucepan.

Bring it to a boil over high heat.

Reduce and simmer uncovered for about 20 minutes or until the sugar is completely dissolved.

Removed the water/sugar mixture from heat.

Allow the mixture to sit for about an hour to cool.

Then pour the simple syrup into a mason jar.

Place the jar in the refrigerator for another hour or even overnight to completely cool.

Add the strawberries and mint to a glass jar.

Using a muddler or the back of a spoon, mash the strawberries and the mint leaves together.

Pour the mandarin orange juice into the glass followed by the lime juice and the simple syrup.

Finally add the seltzer water.

Mix well.

Serve immediately.