How to plan a solar system birthday party

How to plan a solar system birthday partyOur son, Joshua is obsessed with the solar system and as a budding astronomer,  we thought the solar system was the perfect theme for his seventh birthday party! Read how I put together this awesome party…


We hosted the solar system party for twenty of Joshua’s closest friends at the Iziko Planetarium which is housed in the South African Museum building in Cape Town.

The party was set up on the spacious level below the main auditorium of the Planetarium.

Suitable for Ages


Colour Scheme

Blue, green and yellow

Solar System Invitation

For the invitation design I used some rocket and space themed clipart and placed Joshua’s photo in an astronaut suit (much to his delight!). The solar system party invitation features rockets, planets and asteroids. This invitation is available for purchase as a printable in my shop and can be customized with your own wording and photos.

Solar System Birthday Invitation | Hello Babies Shop

Party Decor

I bought rocket-themed paper plates at The Crazy Store and used only yellow, green or blue utensils and table cloths.

Rocket paper plates

Thanks to the awesome choice of venue, we already had walls covered with informative space-related posters and real meteorites in glass cases. In addition we set up the main party area with cardboard cut-outs of moons and stars covered in silver tinfoil (which we had borrowed from our school’s storeroom) and blue and green balloons which we hung from the ceiling throughout the room. We also wrapped blue and green bunting around the pillars.

Solor system Party

Solar System Party Food

Planet Earth DIY Cake

I made a home-baked version of an earth cake which was baked round and covered in blue marble butter cream icing. Each continent was printed and carved onto green plastic icing. Once all the continents were in place on the blue butter cream “ocean” icing I used additional powered food coloring and a paint brush to shade the edges of the continents darker.

The look on J's face is well worth all the effort

As a finishing touch, I helped Joshua cut out two tiny red hearts and shade it with red powered color. Joshua also placed a South African and an Australian flag on toothpicks and added this to the cake. One marked our home in Cape Town, South Africa and another one marked Tasmania, Australia. Joshua’s one set of grandparents live in Tasmania and it was very important to him that they be included somehow in his special day.

J helping with his own cakeDIY Earth Cake


Corn flake Meteorites

Corn flake meteoritesI found this amazing recipe for corn flake meteorites over on The Celebration Shoppe website and got up at 4am on the morning of Joshua’s party to make a few dozen corn flake meteorites. We don’t have Karo (corn) Syrup in South Africa so I had to substitute this with Illovo Golden Syrup. Despite that they turned out perfectly and were delicious to eat!

Planet Cake Pops

I have a very bad track record with baking cake pops despite my Babycakes Cake Pop maker (which I’ve never figured out how to use). But for some reason, this time all the planets aligned in my favor and I actually managed to produce two dozen perfectly round (albeit very sweet) cake pops which I decorated as planets and sprinkled with edible glitter to make them shimmer like stars!

Rocket Fuel

All the juice boxes were covered with silver tinfoil and labelled as “Rocket Fuel”.

Star constellation cupcakes

IMG_20140516_230458Once again the planets aligned and my icing for the cupcakes was the desired deep blue and bright green. I sprinkled stars and edible glitter on the top.

Star-shaped “soetkoekies” (sweet biscuits)

A South African favorite, my little three-year old daughter, Alexandra was very pleased to be included in the preparations of her brothers party on the night before and helped me bake some shortbread biscuits in the shape of stars from her own collection of cookie cutters. I felt honored when a granny at the party commented that she had not tasted such an authentic short-bread biscuit since her childhood!


Due to the location of the party, there was no need to plan any extra party games. After the kids had had their snacks the parents and kids all headed upstairs to the dome-shaped amphitheater. The speaker called the birthday boy up onto the stage and we all sang happy birthday to him. The planetarium then recreated the night sky in the dome-shaped ceiling and took us on a thrilling educational journey through space – it was the ultimate in arm-chair travel!

BIrthday boy

Party Favors

Every child took home a big silver balloon, a “mega planet” lollipop, pop rocks (which a huge hit at ANY party) and a big marble “planet”.

Party favor table

According to Josh and all his friends our solar system birthday party was a HUGE success and an experience that they would never forget!

Solar System party

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More inspiration from Pinterest

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Original images and their credits available on Pinterest.