For our son's 1st birthday we threw a construction party.  He already had the overalls with tool embroidery (from Target) and we bought him little work boots and a small hard hat that came with his boxed tool kit (from Toys R Us).  Sent out invitations I printed out with our son on the front wearing a hard hat and reading: Under Construction...inside it read: Help us build a great 1st birthday for XXXXX, Construction Date/Time, Work Site, and RSVP to site Foreman (parents and number). We started with yellow and black plates, napkins, forks, spoons, knives and table covers (from party discount stores) and used our son's toy Tonka and other trucks for table decorations (washed and cleaned of course!). We filled them with wrapped candy, the eating utensils and napkins. Among the party decorations, were some orange construction cones we had from my old days of playing soccer(but you can find them at Home Depot also, though a bit pricey if using only for your party), CAUTION tape in large rolls (from Home Depot) wrapped around the patio posts and across the tops of the door ways, black and yellow streamers on ceilings and on walls, matching balloons outside (to signal the party house, inside in bunches with curling ribbon attached and a matching Mylar one tied to the guest of honor's high chair, a dump truck pinata and construction signs I printed up (most from Printmaster and MS Publisher clip art) and cut out to stick on the walls(reading: "Warning, Drooling Ahead" and "Caution: Babies At Play", etc.). I baked a small carrot cake for him decorated similar to the guest's large sheet cake (made of chocolate and vanilla for those who chose not to have chocolate which was poured at the same time in the cake pan so they would be half and half) with frosting tinted so I could created streets and grass. Then placed a few new construction Match Box type vehicles on top, some unloading mini M&Ms onto the "streets". We let our son "dig" into his cake with his hands as we all watched with laughter. We had punch, hot dogs, hamburgers, salads, chips and dips and BBQ chicken. Planned a construction Lotto (played like Bingo) with cards made with subject clip art glued to them and matching playing pieces to draw from. Played Pin the Hard Hat on the Construction Worker (which was a blown up pict of our son) and ended it with a dump truck pinata! Party favors included holographic pencils, large rubber balls (from discount party supplier), stickers I printed up of the birthday boy wearing his hard hat, blowouts which I replaced the cardboard design with one I designed on the computer onto cardstock and cut out, Frisbees with B&W picture of the birthday boy (from his aunt who works at a manufacturing supplier) and Kit Kat bars with the wrappers replaced with ones I printed up on the computer reading: XXXXX's first birthday, with yellow and black caution stripes and ingredients: sugar and spice and everything nice AND rocks and snails and puppy dogs tails! Everyone, including the parents left with smiles and laughter!